Preparation and Characterization of Chitosan - Double Walled Carbon Nanotubes Hydrogels

Inthepresentarticle,theauthorshavepreparednanocompositesbasedonchitosan(CS)anddouble walledcarbonnanotubes (functionalizedwithcarboxylgroups (DWCNT-COOH)andun treated DWCNT)bycastingthestablemixtureinamold.DifferentconcentrationsofDWCNTwereused inthepreparationofnanocompositehydrogels.ThesedifferentlyconcentratedDWCNThydrogels werechemicallycharacterizedusingFourierTransform-InfraredSpectroscopy(FT-IR),Scanning ElectronMicroscopy(SEM)andThermalanalysisandcalorimetry(TGA).Thedispersionofthe carbonnanotubeswereobservedinthechitosanmatrixbySEM.TheadditionofDWCNTinthe compositehydrogelsignificantlyreducedthewateruptakeability.However,thewateruptakeability oftheCS/DWCNT-COOHnanocompositehasbeenbetterthantheCS/DWCNT.Also,dispersion offunctionalizedDWCNTinthechitosanmatrix,wasincreasedthethermalstabilityofhydrogels. KEyWoRDS Chitosan, Doubel Walled Carbon Nanotubes, DWCNT, Hydrogel

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